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package com.anthonyhilyard.iceberg.renderer;
import com.mojang.blaze3d.vertex.PoseStack;
import com.mojang.blaze3d.systems.RenderSystem;
import com.mojang.blaze3d.pipeline.MainTarget;
import com.mojang.blaze3d.pipeline.RenderTarget;
import com.mojang.blaze3d.platform.Lighting;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.lwjgl.opengl.GL11;
import net.minecraft.client.Minecraft;
import net.minecraft.client.renderer.entity.ItemRenderer;
import net.minecraft.client.renderer.texture.OverlayTexture;
import net.minecraft.client.renderer.texture.TextureManager;
import com.mojang.blaze3d.platform.GlStateManager.SourceFactor;
import com.mojang.blaze3d.platform.GlStateManager.DestFactor;
import com.mojang.math.Matrix4f;
import net.minecraft.client.color.item.ItemColors;
import net.minecraft.client.gui.GuiComponent;
import net.minecraft.client.renderer.BlockEntityWithoutLevelRenderer;
import net.minecraft.client.renderer.MultiBufferSource;
import net.minecraft.client.renderer.block.model.ItemTransforms;
import net.minecraft.client.resources.model.BakedModel;
import net.minecraft.client.resources.model.ModelManager;
import net.minecraft.world.inventory.InventoryMenu;
import net.minecraft.world.item.ItemStack;
/**
* An extended ItemRenderer that allows items to be rendered to RenderTarget before drawing to screen.
* This allows alpha values to be supported properly by all item types, even semi-transparent items.
*/
public class CustomItemRenderer extends ItemRenderer
{
@SuppressWarnings("unused")
private static final Logger LOGGER = LogManager.getLogger();
private static RenderTarget iconFrameBuffer = null;
private Minecraft mc;
public CustomItemRenderer(TextureManager textureManagerIn, ModelManager modelManagerIn, ItemColors itemColorsIn, BlockEntityWithoutLevelRenderer blockEntityRendererIn, Minecraft mcIn)
{
super(textureManagerIn, modelManagerIn, itemColorsIn, blockEntityRendererIn);
mc = mcIn;
// Initialize the icon framebuffer if needed.
if (iconFrameBuffer == null)
{
// Use 96 x 96 pixels for the icon frame buffer so at 1.5 scale we get 4x resolution (for smooth icons on larger gui scales).
iconFrameBuffer = new MainTarget(96, 96);
iconFrameBuffer.setClearColor(0.0f, 0.0f, 0.0f, 0.0f);
iconFrameBuffer.clear(Minecraft.ON_OSX);
}
}
public void renderItemModelIntoGUIWithAlpha(ItemStack stack, int x, int y, float alpha)
{
BakedModel bakedModel = mc.getItemRenderer().getModel(stack, null, null, 0);
RenderTarget lastFrameBuffer = mc.getMainRenderTarget();
// Bind the icon framebuffer so we can render to texture.
iconFrameBuffer.clear(Minecraft.ON_OSX);
iconFrameBuffer.bindWrite(true);
RenderSystem.clear(GL11.GL_DEPTH_BUFFER_BIT, Minecraft.ON_OSX);
RenderSystem.backupProjectionMatrix();
RenderSystem.setProjectionMatrix(Matrix4f.orthographic(0.0f, iconFrameBuffer.width, iconFrameBuffer.height, 0.0f, 1000.0f, 3000.0f));
Lighting.setupFor3DItems();
mc.getTextureManager().getTexture(InventoryMenu.BLOCK_ATLAS).setFilter(false, false);
RenderSystem.setShaderTexture(0, InventoryMenu.BLOCK_ATLAS);
RenderSystem.enableBlend();
RenderSystem.blendFuncSeparate(SourceFactor.SRC_ALPHA, DestFactor.ONE_MINUS_SRC_ALPHA, SourceFactor.ONE, DestFactor.ONE_MINUS_SRC_ALPHA);
RenderSystem.setShaderColor(1.0F, 1.0F, 1.0F, 1.0F);
PoseStack modelViewStack = RenderSystem.getModelViewStack();
modelViewStack.pushPose();
modelViewStack.setIdentity();
modelViewStack.translate(48.0f, 48.0f, -2000.0f);
modelViewStack.scale(96.0F, 96.0F, 96.0F);
RenderSystem.applyModelViewMatrix();
PoseStack poseStack = new PoseStack();
MultiBufferSource.BufferSource multibuffersource$buffersource = Minecraft.getInstance().renderBuffers().bufferSource();
boolean flag = !bakedModel.usesBlockLight();
if (flag) { Lighting.setupForFlatItems(); }
render(stack, ItemTransforms.TransformType.GUI, false, poseStack, multibuffersource$buffersource, 0xF000F0, OverlayTexture.NO_OVERLAY, bakedModel);
multibuffersource$buffersource.endBatch();
RenderSystem.enableDepthTest();
if (flag) { Lighting.setupFor3DItems(); }
modelViewStack.popPose();
RenderSystem.applyModelViewMatrix();
RenderSystem.restoreProjectionMatrix();
// Rebind the previous framebuffer, if there was one.
if (lastFrameBuffer != null)
{
lastFrameBuffer.bindWrite(true);
// Blit from the texture we just rendered to, respecting the alpha value given.
RenderSystem.enableBlend();
RenderSystem.defaultBlendFunc();
RenderSystem.disableCull();
RenderSystem.setShaderColor(1.0f, 1.0f, 1.0f, alpha);
modelViewStack.pushPose();
modelViewStack.scale(1.0f, -1.0f, 1.0f);
modelViewStack.translate(0.0f, 0.0f, 50.0f + this.blitOffset);
RenderSystem.applyModelViewMatrix();
RenderSystem.setShaderTexture(0, iconFrameBuffer.getColorTextureId());
GuiComponent.blit(new PoseStack(), x, y - 18, 16, 16, 0, 0, iconFrameBuffer.width, iconFrameBuffer.height, iconFrameBuffer.width, iconFrameBuffer.height);
modelViewStack.popPose();
RenderSystem.applyModelViewMatrix();
iconFrameBuffer.unbindRead();
}
else
{
iconFrameBuffer.unbindWrite();
}
}
}
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